public byte[] Generate(
	int duration,
	int volume = 20
)

Public Function Generate ( 
	duration As Integer,
	Optional volume As Integer = 20
) As Byte()

public:
array<unsigned char>^ Generate(
	int duration, 
	int volume = 20
)

member Generate : 
        duration : int * 
        ?volume : int 
(* Defaults:
        let _volume = defaultArg volume 20
*)
-> byte[]